Heat Exchanger

ABSTRACT

A heat exchanger, including at least one flat pipe, each flat pipe is provided with a refrigerant cavity, an inlet, an outlet and two through holes, the inlet and the outlet are located at two ends of the refrigerant cavity, respectively, and both the inlet and the outlet communicate with the refrigerant cavity; the two through holes are respectively located at two ends of the refrigerant cavity, and the two through holes do not communicate with the refrigerant cavity. The flat pipe is provided with the inlet, the outlet and two through holes, when the plurality of flat pipes are matched with liquid collecting pipes (liquid inlet pipes or liquid outlet pipes) of the heat exchanger, different flat pipes can choose to use the inlets or outlets to communicate with the liquid collecting pipes, and the through holes are able to be used to avoid the liquid collecting pipes.

CROSS-REFERENCE TO RELATED APPLICATION(S)

The present disclosure is a national stage application of InternationalPatent Application No. PCT/CN2020/138147, which is filed on Dec. 21,2020. The present disclosure claims priority to Patent Application No.202010125842.5, filed to the China National Intellectual PropertyAdministration on Feb. 27, 2020 and entitled “Heat Exchanger”.

TECHNICAL FIELD

The disclosure relates to the technical field of heat exchangers, inparticular to a heat exchanger.

BACKGROUND

In an art known to inventors, a micro-channel heat exchanger for doublecompressors is disclosed, which includes flat pipe groups and liquidcollecting pipes, the flat pipe groups are distributed in parallel alongan axial direction of the liquid collecting pipes, the liquid collectingpipes include a first liquid collecting pipe disposed at left ends ofthe flat pipe groups and a second liquid collecting pipe disposed atright ends of the flat pipe groups, an isolating assembly for separatingan inner cavity of each liquid collecting pipe into an upper part innercavity and a lower part inner cavity is disposed in the each liquidcollecting pipe, counting backwards from a front end of each liquidcollecting pipe, a left end of the odd-numbered flat pipe groupcommunicates with the upper part inner cavity of the first liquidcollecting pipe, a right end of the odd-numbered flat pipe groupcommunicates with the lower part inner cavity of the second liquidcollecting pipe, a left end of the even-numbered flat pipe groupcommunicates with the lower part inner cavity of the first liquidcollecting pipe, and a right end of the even-numbered flat pipe groupcommunicates with the upper part inner cavity of the second liquidcollecting pipe. According to the technical solution, when onecompressor is started, the fin part of the heat exchanger can still bein complete contact with another flow path for heat exchange, then aheat exchange area of the heat exchanger is utilized to the maximumextent, energy such as wind energy and electric energy is reasonablyutilized, the heat exchange efficiency is improved, and a purpose ofsaving energy is achieved. However, for the heat exchanger, due to thelimitation of the structures such as the flat pipes, in order to realizedouble flow paths, the complex structures such as the isolating assemblyneed to be disposed, so that the problems that the structure is complexand the manufacturing and assembly are inconvenient exist.

SUMMARY

The disclosure provides a heat exchanger, for solving the problem thatthe double-flow-path heat exchanger in the art known to inventors iscomplex in structure and inconvenient to manufacture and assemble.

In order to solve the above problem, the disclosure provides a heatexchanger, which includes at least one flat pipe, each flat pipe isprovided with a refrigerant cavity, an inlet, an outlet and two throughholes, where the inlet and the outlet are located at two ends of therefrigerant cavity, respectively, and both the inlet and the outletcommunicate with the refrigerant cavity; and the two through holes arerespectively located at two ends of the refrigerant cavity, and the twothrough holes do not communicate with the refrigerant cavity.

In some embodiments, a plurality of flat pipes are provided, theplurality of flat pipes include first flat pipes and second flat pipeswhich are alternately distributed, the heat exchanger further includes afirst liquid inlet pipe, a second liquid inlet pipe, a first liquidoutlet pipe and a second liquid outlet pipe, a first inlet of each firstflat pipe communicates with the first liquid inlet pipe, a first outletof the each first flat pipe communicates with the first liquid outletpipe, a second inlet of each second flat pipe communicates with thesecond liquid inlet pipe, and a second outlet of the each second flatpipe communicates with the second liquid outlet pipe; two through holesof the first flat pipe are a first through hole and a second throughhole respectively, two through holes of the second flat pipe are a thirdthrough hole and a fourth through hole respectively, the first throughhole is disposed corresponding to the second outlet, the second throughhole is disposed corresponding the second inlet, the third through holeis disposed corresponding to the first inlet, the fourth through hole isdisposed corresponding to the first outlet, the first through holecommunicates with the second liquid outlet pipe, the second through holecommunicates with the second liquid inlet pipe, the third through holecommunicates with the first liquid inlet pipe, and the fourth throughhole communicates with the first liquid outlet pipe.

In some embodiments, the first liquid inlet pipe and the second liquidoutlet pipe are located at one end of the each first flat pipe, and thefirst liquid outlet pipe and the second liquid inlet pipe are located atthe other end of the each first flat pipe.

In some embodiments, the first liquid inlet pipe, the second liquidinlet pipe, the first liquid outlet pipe and the second liquid outletpipe are distributed along a length direction of the first flat pipe, orthe first liquid inlet pipe and the second liquid outlet pipe aredistributed along a width direction of the first flat pipe, and thefirst liquid outlet pipe and the second liquid inlet pipe aredistributed along the width direction of the first flat pipe.

In some embodiments, each flat pipe includes two heat exchange plateswhich are connected together in a sealed manner, and the two heatexchange plates are symmetrically disposed relative to a preset symmetryplane.

In some embodiments, each heat exchange plate includes a plate body, awelding edge disposed at a periphery of the plate body, and a firstconvex surface and a second convex surface disposed at two ends of theplate body at intervals, and the welding edge, the first convex surfaceand the second convex surface are all located on a same side of theplate body; an area between the plate bodies of the two heat exchangeplates forms the refrigerant cavity, welding edges of the two heatexchange plates are welded together, the first convex surfaces of thetwo heat exchange plates are welded together, and the second convexsurfaces of the two heat exchange plates are welded together; the inletand the outlet are respectively located at two ends of the plate body,and the two through holes are respectively located on the first convexsurface and the second convex surface.

In some embodiments, the inlet, one of the two through holes, the outletand the other of the two through holes are distributed along a lengthdirection of the heat exchange plate; or, the inlet and one of the twothrough holes are distributed along a width direction of the heatexchange plate, and the outlet and the other of the two through holesare distributed along the width direction of the heat exchange plate.

In some embodiments, the first liquid inlet pipe includes a plurality ofpipe sections which communicate in sequence, one end of each pipesection is connected with the first flat pipe in a sealed manner, andthe other end of the each pipe section is connected with the second flatpipe in a sealed manner.

In some embodiments, the each pipe section includes a pipe body and afirst ring body and a second ring body respectively disposed at two endsof the pipe body, the first ring body is welded with an outer wall ofthe first flat pipe, and the second ring body is welded with an outerwall of the second flat pipe.

In some embodiments, the first liquid inlet pipe, the second liquidinlet pipe, the first liquid outlet pipe and the second liquid outletpipe have the same structure.

By adoption of the technical solution of some embodiments in thedisclosure, the heat exchanger is provided, which includes the flatpipes, each flat pipe is provided with the refrigerant cavity, theinlet, the outlet, and two through holes, where the inlet and the outletare located at two ends of the refrigerant cavity, respectively, andboth the inlet and the outlet communicate with the refrigerant cavity;and the two through holes are respectively located at two ends of therefrigerant cavity, and the two through holes do not communicate withthe refrigerant cavity. By adoption of the technical solution of thedisclosure, since the flat pipe is provided with the inlet, the outletand two through holes, when the plurality of flat pipes are matched withthe liquid collecting pipes (the liquid inlet pipes or the liquid outletpipes) of the heat exchanger, different flat pipes can choose to use theinlets or outlets to communicate with the liquid collecting pipes, andthe through holes can be used to avoid the liquid collecting pipes, sothat different parts in the heat exchanger are convenient to arrange andassemble, thus realizing double flow paths. Compared with the art knownto inventors, there is no need to dispose complex structures such as theisolating assembly, thus the structure of the heat exchanger issimplified, and the manufacturing and assembling are facilitated.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings, which form a part hereof, serve to provide a furtherunderstanding of the disclosure, and illustrative embodiments of thedisclosure and descriptions thereof serve to explain the disclosure andare not to be construed as unduly limiting the disclosure. In thedrawings:

FIG. 1 illustrates a schematic structure diagram of a heat exchangerprovided by embodiment 1 of the disclosure.

FIG. 2 illustrates an exploded diagram of the heat exchanger in FIG. 1 .

FIG. 3 illustrates an enlarged partial diagram of the heat exchanger inFIG. 1 .

FIG. 4 illustrates a schematic structure diagram of a first flat pipe inFIG. 1 .

FIG. 5 illustrates an enlarged partial diagram of the left end of thefirst flat pipe in FIG. 4 .

FIG. 6 illustrates an enlarged partial diagram of the right end thefirst flat pipe in FIG. 4 .

FIG. 7 illustrates a schematic structure diagram of a heat exchangerprovided by embodiment 2 of the disclosure.

FIG. 8 illustrates an exploded diagram of the heat exchanger in FIG. 7 .

FIG. 9 illustrates a cross-sectional diagram of the heat exchanger inFIG. 7 at position A-A.

FIG. 10 illustrates a cross-sectional diagram of the heat exchanger inFIG. 7 at position B-B.

FIG. 11 illustrates a schematic structure diagram of the first flat pipein FIG. 7 .

FIG. 12 illustrates a cross-sectional diagram of a left end of the firstflat pipe in FIG. 11 .

FIG. 13 illustrates a cross-sectional diagram of a right end of thefirst flat pipe in FIG. 11 .

Where, the above-mentioned figures include the following referencenumerals:

11. First liquid inlet pipe; 12. Second liquid inlet pipe; 13. Firstliquid outlet pipe; 14. Second liquid outlet pipe; 15. Pipe section; 20.First flat pipe; 21. First inlet; 22. First outlet; 23. First throughhole; 24. Second through hole; 25. Heat exchange plate; 26. Plate body;27. Welding edge; 28. First convex surface; 29. Second convex surface;30. Second flat pipe; 31. Second inlet; 32. Second outlet; 33. Thirdthrough hole; 34. Fourth through hole; and 40. Fin.

DETAILED DESCRIPTION OF THE EMBODIMENTS

A clear and complete description on the technical solutions in theembodiments of the disclosure will be given below, in combination withthe drawings in the embodiments of the disclosure. Obviously, theabove-described embodiments are only some, but not all, embodiments ofthe disclosure. The following description for at least one exemplaryembodiment is merely illustrative in nature and is in no way intended tolimit the disclosure, its application, or uses. All other embodimentsobtained by those of ordinary skill in the art based on the embodimentsof the disclosure without creative efforts shall fall within theprotection scope of the disclosure.

A shown in the figures, the embodiments of the disclosure provide a heatexchanger, which includes at least one flat pipe, each flat pipe isprovided with a refrigerant cavity, an inlet, an outlet and two throughholes, where the inlet and the outlet are located at two ends of therefrigerant cavity, respectively, and both the inlet and the outletcommunicate with the refrigerant cavity; the two through holes arerespectively located at two ends of the refrigerant cavity, and the twothrough holes do not communicate with the refrigerant cavity. Byadoption of the technical solution of the disclosure, since the flatpipe is provided with the inlet, the outlet and two through holes, whenthe plurality of flat pipes are matched with liquid collecting pipes(the liquid inlet pipes or liquid outlet pipes) of the heat exchanger,different flat pipes can choose to use the inlets or outlets tocommunicate with the liquid collecting pipes, and the through holes isable to be used to avoid the liquid collecting pipes, so that differentparts in the heat exchanger are convenient to arrange and assemble, thusrealizing double flow paths. Compared with an art known to inventors,there is no need to dispose complex structures such as the isolatingassembly, thus the structure of the heat exchanger is simplified, andthe manufacturing and assembling are facilitated.

In the embodiment, a plurality of flat pipes are available, theplurality of flat pipes include first flat pipes 20 and second flatpipes 30 which are alternately distributed, the heat exchanger furtherincludes a first liquid inlet pipe 11, a second liquid inlet pipe 12, afirst liquid outlet pipe 13 and a second liquid outlet pipe 14, a firstinlet 21 of each first flat pipe 20 communicates with the first liquidinlet pipe 11, a first outlet 22 of the each first flat pipe 20communicates with the first liquid outlet pipe 13, a second inlet 31 ofeach second flat pipe 30 communicates with the second liquid inlet pipe12, and a second outlet 32 of the each second flat pipe 30 communicateswith the second liquid outlet pipe 14; two through holes of first flatpipe 20 are a first through hole 23 and a second through hole 24respectively, two through holes of the second flat pipe 30 are a thirdthrough hole 33 and a fourth through hole 34 respectively, the firstthrough hole 23 is disposed corresponding to the second outlet 32, thesecond through hole 24 is disposed corresponding the second inlet 31,the third through hole 33 is disposed corresponding to the first inlet21, the fourth through hole 34 is disposed corresponding to the firstoutlet 22, the first through hole 23 communicates with the second liquidoutlet pipe 14, the second through hole 24 communicates with the secondliquid inlet pipe 12, the third through hole 33 communicates with thefirst liquid inlet pipe 11, and the fourth through hole 34 communicateswith the first liquid outlet pipe 13.

In the technical solution, the first inlet 21 of the first flat pipe 20is the inlet of the flat pipe, and the first outlet 22 of the first flatpipe 20 is the outlet of the flat pipe. The second inlet 31 of thesecond flat pipe 30 is the inlet of the flat pipe, and the second outlet32 of the second flat pipe 30 is the outlet of the flat pipe. Byadoption of the technical solution, double flow paths can be realized bythe cooperation of the first liquid inlet pipe 11, the second liquidinlet pipe 12, the first liquid outlet pipe 13 and the second liquidoutlet pipe 14 with a plurality of first flat pipes 20 and a pluralityof second flat pipes 30 which are alternately disposed. Compared withthe art known to inventors, there is no need to dispose complexstructures such as the isolating assembly, thus the structure of theheat exchanger is simplified, and the manufacturing and assembling arefacilitated.

In some embodiments, the plurality of first flat pipes 20 and theplurality of second flat pipes 30 are alternately disposed, that is,there is one second flat pipe 30 between two adjacent first flat pipes20 and one first flat pipe 20 between two adjacent second flat pipes 30.In some embodiments, fins 40 are disposed between adjacent first flatpipe 20 and second flat pipes 30, so that the heat exchange area isincreased. According to the technical solution, the heat exchanger hastwo flow paths, during use, each flow path corresponds to onecompressor, therefore, when one compressor is started, one flow path isclosed, a fin part of the heat exchanger can still be in completecontact with the other flow path for heat exchange, so that the heatexchange area of the heat exchanger is utilized to the maximum extent,energy such as wind energy and electric energy is reasonably utilized,the heat exchange efficiency is improved, and the purpose of savingenergy is achieved.

In some embodiments, the first flat pipe 20 and the second flat pipe 30have the same structure, and the first flat pipe 20 and the second flatpipe 30 are installed interchangeably. Therefore, only one flat pipeneeds to be manufactured, which is beneficial for reducing themanufacturing cost, and meanwhile, the assembly is convenient. Duringassembly, the first flat pipe 20 can be assembled to the position of thesecond flat pipe 30 by rotating 180 degrees, or the second flat pipe 30can be assembled to the position of the first flat pipe 20 by rotating180 degrees.

In some embodiments, the first liquid inlet pipe 11 and the secondliquid outlet pipe 14 are located at one end of the first flat pipe 20,and the first liquid outlet pipe 13 and the second liquid inlet pipe 12are located the other end of the first flat pipe 20. Through the abovearrangement, the condensation in the two flow paths flows reversely,which is beneficial for improving the heat exchange uniformity atdifferent positions.

In some embodiments, the first liquid inlet pipe 11, the second liquidinlet pipe 12, the first liquid outlet pipe 13 and the second liquidoutlet pipe 14 are distributed along a length direction of the firstflat pipe 20. In embodiment 2, the first liquid inlet pipe 11 and thesecond liquid outlet pipe 14 are distributed along a width direction ofthe first flat pipe 20, and the first liquid outlet pipe 13 and thesecond liquid inlet pipe 12 are distributed along the width direction offirst flat pipe 20. The above two arrangement manners are different andcan achieve the same heat exchange effect.

In some embodiments, the flat pipe (the first flat pipe 20 or the secondflat pipe 30) includes two heat exchange plates 25 which are connectedtogether in a sealed manner, and the two heat exchange plates 25 aresymmetrically disposed relative to a preset symmetry plane, which isbeneficial for processing. In some embodiments, the first flat pipe 20is stamped and formed into heat exchange plates by a composite aluminumplate, and the two heat exchange plates are mirror-overlapped to formthe first flat pipe 20, which is then brazed into a whole, belonging tothe category of stamping and forming of flat pipes. The second flat pipe30 can also be processed in this way.

In some embodiments, each heat exchange plate 25 includes a plate body26, a welding edge 27 disposed at a periphery of the plate body 26, anda first convex surface 28 and a second convex surface 29 disposed at twoends of the plate body 26 at intervals, and the welding edge 27, thefirst convex surface 28 and the second convex surface 29 are all locatedon the same side of the plate body 26; an area between the plate bodies26 of the two heat exchange plates 25 forms the refrigerant cavity,welding edges 27 of the two heat exchange plates 25 are welded together,the first convex surfaces 28 of the two heat exchange plates 25 arewelded together, and the second convex surfaces 29 of the two heatexchange plates 25 are welded together; the first inlet 21 and the firstoutlet 22 are respectively located at two ends of the plate body 26, thefirst through hole 23 is located on the first convex surface 28, and thesecond through hole 24 is located on the second convex surface 29. Inthis way, it is convenient to process the inlet, the outlet and eachthrough hole, meanwhile, a communication between the through hole andthe refrigerant cavity is avoided, thus avoiding the communicationbetween the two flow paths.

Taking the first flat pipe 20 as an example, in embodiment 1, the firstinlet 21, the first through hole 23, the first outlet 22 and the secondthrough hole 24 are distributed along a length direction of the heatexchange plate 25. In embodiment 2, the first inlet 21 and the firstthrough hole 23 are distributed along a width direction of heat exchangepipe 25, and the first outlet 22 and the second through hole 24 aredistributed along the width direction of heat exchange plate 25.

In some embodiments, the first liquid inlet pipe 11 includes a pluralityof pipe sections 15 which communicate in sequence, one end of each pipesection 15 is connected with the first flat pipe 20 in a sealed manner,and the other end of the each pipe section 15 is connected with thesecond flat pipe 30 in a sealed manner. Through above arrangement, theconnection of the first liquid inlet pipe 11 with a plurality of firstflat pipes 20 and a plurality of second flat pipes 30 is facilitated.

Specifically, each pipe section 15 includes a pipe body and a first ringbody and a second ring body respectively disposed at two ends of thepipe body, the first ring body is welded with an outer wall of the firstflat pipe 20, and the second ring body is welded with an outer wall ofthe second flat pipe 30. Through above arrangement, welding isfacilitated, and the connection strength and sealing effect areimproved.

In some embodiments, the first liquid inlet pipe 11, the second liquidinlet pipe 12, the first liquid outlet pipe 13 and the second liquidoutlet pipe 14 have the same structure. In this way, the number of partsof the heat exchanger can be reduced, processing and assembly arefacilitated, and the manufacturing cost can be reduced.

By adoption of the technical solution, the heat exchanger includes thefirst liquid inlet pipe 11, the second liquid inlet pipe 12, the firstliquid outlet pipe 13, the second liquid outlet pipe 14, the first flatpipe 20 and the second flat pipe 30, two ends of the first flat pipe 20are respectively provided with a first inlet 21 and a first outlet 22which communicate with the refrigerant cavity in the first flat pipe 20,two ends of the second flat pipe 30 are respectively provided with thesecond inlet 31 and the second outlet 32 both communicating with therefrigerant cavity in the second flat pipe 30, a plurality of first flatpipes 20 and a plurality of second flat pipes 30 are available, theplurality of first flat pipes 20 and the plurality of second flat pipes30 are alternately distributed, the first inlet 21 of each first flatpipe 20 communicates with the first liquid inlet pipe 11, the firstoutlet 22 of each first flat pipe 20 communicates with the first liquidoutlet pipe 13, the second inlet 31 of each second flat pipe 30communicates with the second liquid inlet 12, and the second outlet 32of each second flat pipe 30 communicates with the second liquid outletpipe 14. By adoption of the technical solution, a double flow path isrealized by the cooperation of the first liquid inlet pipe 11, thesecond liquid inlet pipe 12, the first liquid outlet pipe 13 and thesecond liquid outlet pipe 14 with a plurality of first flat pipes 20 anda plurality of second flat pipes 30 which are alternately disposed.Compared with the art known to inventors, there is no need to disposecomplex structures such as the isolating assembly, thus the structure ofthe heat exchanger is simplified, and the manufacturing and assemblingare facilitated. In addition, the first flat pipe 20 and the second flatpipe 30 can be interchanged, which is beneficial for processing andassembly.

The foregoing is merely some embodiments of the disclosure and is notintended to limit the disclosure, and various modifications andvariations of the disclosure may be available for those skilled in theart. Any modifications, equivalents, improvements, etc., made within thespirit and principles of the disclosure are intended to be includedwithin the scope of the disclosure.

What is claimed is:
 1. A heat exchanger, comprising at least one flatpipe, each flat pipe is provided with a refrigerant cavity, an inlet, anoutlet and two through holes, wherein the inlet and the outlet arelocated at two ends of the refrigerant cavity respectively, and both theinlet and the outlet communicate with the refrigerant cavity; and thetwo through holes are respectively located at two ends of therefrigerant cavity, and the two through holes do not communicate withthe refrigerant cavity.
 2. The heat exchanger as claimed in claim 1,wherein a plurality of flat pipes are provided, the plurality of flatpipes comprise first flat pipes and second flat pipes which arealternately distributed, the heat exchanger further comprises a firstliquid inlet pipe, a second liquid inlet pipe, a first liquid outletpipe and a second liquid outlet pipe, a first inlet of each first flatpipe communicates with the first liquid inlet pipe, a first outlet ofthe each first flat pipe communicates with the first liquid outlet pipe,a second inlet of each second flat pipe communicates with the secondliquid inlet pipe, and a second outlet of the each second flat pipecommunicates with the second liquid outlet pipe; two through holes ofthe first flat pipe are a first through hole and second through holerespectively, two through holes of the second flat pipe are a thirdthrough hole and a fourth through hole respectively, the first throughhole corresponds to the second outlet, the second through holecorresponds to the second inlet, the third through hole is disposedcorresponding to the first inlet, the fourth through hole is disposedcorresponding to the first outlet, the first through hole communicateswith the second liquid outlet pipe, the second through hole communicateswith the second liquid inlet pipe, the third through hole communicateswith the first liquid inlet pipe, and the fourth through holecommunicates with the first liquid outlet pipe.
 3. The heat exchanger asclaimed in claim 2, wherein the first liquid inlet pipe and the secondliquid outlet pipe are located at one end of the each first flat pipe,and the first liquid outlet pipe and the second liquid inlet pipe arelocated at the other end of the each first flat pipe.
 4. The heatexchanger as claimed in claim 2, wherein the first liquid inlet pipe,the second liquid inlet pipe, the first liquid outlet pipe and thesecond liquid outlet pipe are distributed along a length direction ofthe first flat pipe; or the first liquid inlet pipe and the secondliquid outlet pipe are distributed along a width direction of the firstflat pipe, and the first liquid outlet pipe and the second liquid inletpipe are distributed along the width direction of the first flat pipe.5. The heat exchanger as claimed in claim 1, wherein each flat pipecomprises two heat exchange plates which are connected together in asealed manner, and the two heat exchange plates are symmetricallydisposed relative to a preset symmetry plane.
 6. The heat exchanger asclaimed in claim 5, wherein each heat exchange plate comprises a platebody, a welding edge disposed at a periphery of the plate body, and afirst convex surface and a second convex surface disposed at two ends ofthe plate body at intervals, and the welding edge, the first convexsurface and the second convex surface are all located on a same side ofthe plate body; an area between plate bodies of the two heat exchangeplates forms the refrigerant cavity, welding edges of the two heatexchange plates are welded together, first convex surfaces of the twoheat exchange plates are welded together, and second convex surfaces ofthe two heat exchange plates are welded together; the inlet and theoutlet are respectively located at two ends of the plate body, and thetwo through holes are respectively located on the first convex surfaceand the second convex surface.
 7. The heat exchanger as claimed in claim6, wherein the inlet, one of the two through holes, the outlet and theother of the two through holes are distributed along a length directionof the heat exchange plate; or, the inlet and one of the two throughholes are distributed along a width direction of the heat exchangeplate, and the outlet and the other of the two through holes aredistributed along the width direction of the heat exchange plate.
 8. Theheat exchanger as claimed in claim 2, wherein the first liquid inletpipe comprises a plurality of pipe sections which communicate insequence, one end of each pipe section is connected with the first flatpipe in a sealed manner, and the other end of the each pipe section isconnected with the second flat pipe in a sealed manner.
 9. The heatexchanger as claimed in claim 8, wherein the each pipe section comprisesa pipe body and a first ring body and a second ring body respectivelydisposed at two ends of the pipe body, the first ring body is weldedwith an outer wall of the first flat pipe, and the second ring body iswelded with an outer wall of the second flat pipe.
 10. The heatexchanger as claimed in claim 8, wherein the first liquid inlet pipe,the second liquid inlet pipe, the first liquid outlet pipe and thesecond liquid outlet pipe have the same structure.